Lancaster, M;
Nurse, E;
Waters, DCDFC;
(2007)
Search for V+A Current in Top-Quark Decays in ppbar Collisions at sqrt[s] =1.96 TeV.
Physical Review Letters
, 98
(7)
, Article 072001. 10.1103/PhysRevLett.98.072001.
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Abstract
We report an upper limit on the fraction of V+A current, fV+A, in top-quark decays, using approximately 700 pb-1 of pp̅ collisions at √s=1.96 TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t→Wb→ℓνb (where ℓ=e or μ), the invariant mass of the charged lepton and the bottom quark jet is sensitive to the polarization of the W boson. We determine fV+A=-0.06±0.25 given a top-quark mass of 175 GeV/c2. We set an upper limit on fV+A of 0.29 at the 95% confidence level, an improvement by a factor of 2 on the previous best direct limit.
| Type: | Article |
|---|---|
| Title: | Search for V+A Current in Top-Quark Decays in ppbar Collisions at sqrt[s] =1.96 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.98.072001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.98.072001 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/131823 |
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